Protecting device for crusher bearings



Dec. 10, 1940.

o. c. GRUENDER ETALN 2,224,542

PROTECTING DEVICE FOR CRUSHER BEARINGS Filed June l1, 1938 2Sheets-Sheet 1 2 Sheets-Sheet 2 ...x I. v E

Dec. 10, i940. o. c. GRUENDER ETAL PROTECTING DEVICE FOR CRUSHERBEARINGS Filed June 11, 195s gruen J6. Zoe 745 ufitto7"???57/5' PatentedDec. 10, 1940 PROTECTING DEVICE Foa oaUs'HEa BEARINGS Oscar C. Gruenderand Howard M. Zoerb, Milwaukee, wisaassignors to Nordberg Manufac`turing Co., Milwaukee, Wis., a corporation of Wisconsin Application June11, 1938, Serial' No. 213,194

3 Claims.

Our invention relates to an improvement in sealing means for bearingsand is particularly applicable to the protection of the bearings of agyratory Crusher.

One purpose is the provision of means associated with the head of agyratory crusher for protecting the bearings for the head or crushershaft. .Y

Another purpose is the provision of a flexible protecting element forsealing the bearings beneath the head, which flexible member shall serveas a seal at all positions of the head.

Other purposes will appear from time to time in the course of thespecification and claims.

We illustrate our invention more or less diagrammatically in theaccompanying drawings wherein:

Figure 1 is a vertical axial section through a gyratory cone crusher;

Figure 2 is a section on the line 2-2 of Figure l;

Figure 3 is a partial vertical section; and

Figure 4 is a vertical axial section through a variant form of thedevice.

Like parts are indicated by like characters throughout the specificationand drawings.

Referring first to Figure 1, I generally indi- Cates an outer framemember,` on which is mounted an adjustable upper member 2, to which issecured a bowl liner 3. 1I is an inner sleeve, forming part of the frameand provided with a bearing 5 in which rotates the member 6 with theeccentric inner aperture 1. 8 is a gear at the top of the member 6, inmesh with a pinion 9 on any suitable drive shaft, whereby the member 6is rotated from any suitable power source, motor or the like.

I2 is a Crusher shaft in the aperture 1, depending from the crusher heador cone I3, which head has the lower convex spherical bearing surfaceI4. I5 is any suitable wear taking mantle. The head is formed with anouter depending apron I6, shown as integral, but which may be separatelyformed, if desirable. It is shown as inwardly recurved, for convenience.

I1 is a frame closure member which serves to house the gear 8, but whichis centrally apertured as at I8, to permit the passage of the shaft I2.It is shown as having an upper bearing member I9, the upper surface ofwhich conforms to the spherical surface I4 of the head I3. As the memberor eccentric 6 is rotated, the shaft I2 and head I3 are gyrated aboutthe center indicated at X, above the top of the head.

If dust or grit penetrates to any of the above (Cl. 83-10) v mentionedbearing surfaces, the crusher can readily be put out of action. Hence,the protection of said'bearings isa matter of vital importance.

from the bearings. ZI is a'circumferential sump which forms part of thelubricating system.

22 indicates a sealing ring upwardly thrustI as by springs 23 andprovided with a bearing surface or wiping surface 24 opposed to acorrespond` ing surface 25 on the apron member I6. 26 is an outercircumferential ledge on the member 22 and 21 indicates a cylindricalbearing surface thereabove. 28 generally indicates a flexible apronherein shown as having an inward ridge 29 about its upper inner edgewhich is re-ceived in a notch 30 in the head I3, the parts being heldcompressed by an overhanging portion of the mantlev I5. The member 28has a. downward inwardly curved or deformed portion 3l adapted for readyflexure and terminates at the bottom in a slip ring or bearing memberincluding an inner ring 32 and an outer ring 33 which may be riveted-together by rivets 34 which pass through the lower edge of the apron28.

It Will be understood that the inner slip ring 32 conforms to thecylindrical bearing surface 21 and normally rests by gravity upon theledge 25. A certain amount of oil may leak outwardly past the surfaces24 and 25 and downwardly to the bearing surface 21. This oil serves totrap whatever ne particles of dust might tend to Work in. It also servesto lubricate the connection between the bearing 21 and the slip ring 32.In practice, the protection thus afforded is eiiicient and complete.

In order to prevent unintended rotation of the member 22, we may providea flattened portion 35 on the member I1 which is opposed by a flat key36 which may be applied to or inset in the member 22.

Referring to the form of Figure 4, we illustrate a downwardly curved andmore or less elongated apron or extension 40 from the head I3 which hasriveted or otherwise secured to its inner face a exible apron 4I whichin turn is. secured to a slip ring 42 resting upon a ledge 43 on themember I1. 44 constitutes a bearing surface on the member I1 againstwhich the slip ring 42 bears. This form of shield is more thoroughlyhoused o protected by the apron 40.

It will be realized that whereas we have described and illustrated apractical and operative device, nevertheless many changes may be made inthe size, shape, number and disposition of parts Any suitable means, notherein shown in detail, may be employed to circulate oil to and withoutdeparting from the spirit of our invention. We therefore wish thedescription and drawings to be taken as in a broad sense illustrativeand diagrammatic rather than as limiting us to our precise showing. Weclaim:

1. In combination, in a-gyratory crusher having a head and means forgyrating it, and a base on which said head is supported, a bearingmember on said base, a wiping member in slidable contact with saidbearing member, a iiexible shield secured to said wiping member, amantle mounted on said head, said ilexible shield including a portionadapted to penetrate and be gripped between said head and mantle, andmeans for holding said mantle against movement in relation to said headwhereby, when said mantle is mounted upon and secured to said head, saidilexible shield is secured in relation to said head and mantle.

2. In combination, in a gyratory Crusher having a head and means forgyrating it, and a base on which said head is supported, a bearingmember on said base, a wiping member in slidable contact with saidbearing member, a ilexible shield secured to said wiping member, amantle mounted on said head, said flexible shieldincluding a portionadapted to penetrate and be gripped between said head and mantle,- andmeans for holding said mantle against movement in relation to said headwhereby, when said mantle is mounted upon and secured to said head, saidflexible shield is secured in relation to said head and mantle, saidhead and mantle being generally conic, said flexible shield including anupper conic portion and a lower-inwardly curved portion` adapted. forready flexure in response to the gyration of the head.

3. In combination, in a gyratory crusher havingv a head and means forgyrating it, a base upon which said head is supported, and a mantlemounted on said head, a flexible shield, including an edge portionpenetrating between said head and mantle, and a portion extendingdownwardly from said head, a fixed wiping member mounted on said baseand including a generally cylindrical vertical portion and an outwardlyextending ledge therebelow, a wiping ring surrounding said cylindricalvertical portion and gravitally resting upon said ledge, at allpositions of the head, said ring being secured to an outer portion ofthe flexible shield, and means for locking the mantle in relation to thehead and for thereby securing the upper edge of said shield in relationto head and mantle. OSCAR C. GRUENDER.

HOWARD M. ZOERB.

